Monday, February 25, 2013
No ringback tone asterisk
You have callers calling in to your Asterisk server using a SIP trunk and they don't hear ringback tone?
Here is what it worked for me.
In the sip.conf file, located in /etc/asterisk/sip.conf:
- In the [general] context check that the parameter prematuremedia=no is present.
- For the related peer (trunk) use the parameter progressinband=yes.